ci(v1-api): install pytest, drop root --cov addopts for perf suite, ascii comment

.github/workflows/ci.yml

@@ -265,7 +265,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
-        pip install locust
+        pip install pytest   # the perf suite is pytest, not locust
 
     - name: Start application
       working-directory: archive/v1
@@ -286,7 +286,9 @@ jobs:
         # test_frame_budget.py, test_inference_speed.py) — there is no
         # locustfile.py, so the old `locust -f tests/performance/locustfile.py`
         # command always failed with "Could not find ...". Run the real suite.
-        pytest tests/performance/ -v --junitxml=perf-junit.xml
+        # -o addopts="" drops the root pyproject's --cov/--cov-fail-under=100
+        # flags (pytest-cov isn't installed here and 100% cov is for unit tests).
+        pytest tests/performance/ -o addopts="" -v --junitxml=perf-junit.xml
 
     - name: Upload performance results
       if: always()
@@ -380,7 +382,7 @@ jobs:
     needs: [docker-build]
     if: github.ref == 'refs/heads/main'
     permissions:
-      contents: write   # gh-pages deploy needs write (GITHUB_TOKEN is read-only by default → 403)
+      contents: write   # gh-pages deploy needs write (GITHUB_TOKEN is read-only by default -> 403)
     steps:
     - name: Checkout code
       uses: actions/checkout@v4